Toyota Corolla (E120): Monitor description

While the engine is being cranked, the battery positive voltage is applied to terminal sta of the ecm.

If the ecm detects the starter control signal (sta) while the vehicle is driving, it will conclude that there is a fault in the starter control circuit. The ecm will turn on the mil and a dtc is set.

Monitor strategy

Monitor strategy

Typical enabling conditions

Typical enabling conditions

Typical malfunction thresholds

Typical malfunction thresholds

Wiring diagram

Wiring diagram

Inspection procedure

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    Inspection procedure
    1 Inspect dlc3 terminal voltage Turn the ignition switch to on.  measure voltage between terminals 13 (tc) and 4 (cg) of dlc3. Ok: voltage: 10 – 16 v 2 Check harness and connector(between cruise control ecu assy and dlc3) Check for open and short circuit in harness ...

    Inspection procedure
    Hint: hand–held tester only: narrowing down the trouble area is possible by performing ”a/f control” active test (heated oxygen sensor or other trouble areas can be distinguished). Perform active test using hand–held tester (a/f control). Hint: ”a/f control” is the active te ...

    If the engine will not start
    If the engine will not start even though correct starting procedures are being followed , consider each of the following points: The engine will not start even though the starter motor operates normally. One of the following may be the cause of the problem: ● There may not be sufficient f ...